Volume 36 Issue 1
Feb.  2019
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DANG Donghong, SONG Yuanhong, WU Yongchao, WANG Chong, HAN Gewei, WU Jinbo, YIN Lu. Pumping Cement Slurry and Drilling Set Cement Plug in High Pressure Open Hole Gas Well[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(1): 93-96. doi: 10.3969/j.issn.1001-5620.2019.01.018
Citation: DANG Donghong, SONG Yuanhong, WU Yongchao, WANG Chong, HAN Gewei, WU Jinbo, YIN Lu. Pumping Cement Slurry and Drilling Set Cement Plug in High Pressure Open Hole Gas Well[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(1): 93-96. doi: 10.3969/j.issn.1001-5620.2019.01.018
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Pumping Cement Slurry and Drilling Set Cement Plug in High Pressure Open Hole Gas Well

doi: 10.3969/j.issn.1001-5620.2019.01.018

  • 1. No.1 Cementing Branch of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062552;

  • 2. Oil and Gas Well Logging Branch of BHDC, Langfang, Hebei 065207;

  • 3. The 2nd Oil Production Plant of PetroChina Changqing Oilfield Company, Qingyang, Gansu 745100

  • Received Date: 2018-10-09
  • Publish Date: 2019-02-28
    Abstract
  • Well SBC-200 is a complex well drilled in a oil and gas field in east Venezuela. Technical casing of φ244.5 mm was run to 4,864 m in this well. Pipe sticking was encountered when drilling the 4th interval (hole size φ215.7 mm) to 4 945.12 m, and several methods of freeing the pipe sticking were tried and failed. Breaking out by explosion was performed and the top of the fish was at depth of 4,897.56 m. Gas cut occurred during drilling with an oil base drilling fluid of 1.415 g/cm3, and was stopped when mud density was 1.44 g/cm3. Mud losses occurred when mud density was 1.49 g/cm3. In order to drill to the designed depth, the open hole 35.53 m above the top of the fish was filled with cement slurry and the well was sidetracked. The well was finally cemented with a cement slurry of high density, high strength and low filtration rate. The cement plug was made to satisfy the needs of sidetracking, using prepad with complex functions and techniques suitable for the well conditions.

     

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